[3] Located on the Vestfold Line, the tunnel was built as part of the 14.3-kilometer (8.9 mi) double-track high-speed segment from Holm to Nykirke.

[4] The new Holmestrand Station is located inside the mountain in the middle of the tunnel.

[5] The total cost of the project was estimated to be 6.6 billion Norwegian Kroner upon completion.

[6] The new tunnel reduces traveling time on the Vestfold Line by five minutes.

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